If one of them didn't after a long time, the other 4 should compensate for the loss.
And what if let's say the compensation amount wasn't enough? Like, 2 or 3 coins didn't go up above 10 in a long time, and the others barely went up 10 at that time, what would you do? Numbers are easy to write ngl, its easy to analyze, choosing what coins to put those numbers is the challenge. It's not enough to know the numbers, any one with a bit of knowledge would know that trading is to buy low sell high. The problem is in knowing "what" to buy low and sell high. Not everything goes according to plan, and im pretty sure every trader out there experience profits and losses always.